在Android中，不通过缺省的内置应用发邮件，自定义邮件发送（检验中）

在Android中，依然可以使用JavaMail来发邮件。

不过在面对Google这样的TLS或SSL保护的邮件系统发送邮件的时候，需要略微注意一下SMTP程序的处理就好了。

这是邮件调用程序，

import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;public class MailSenderActivity extends Activity {    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        final Button send = (Button) this.findViewById(R.id.send);        send.setOnClickListener(new View.OnClickListener() {            public void onClick(View v) {                // TODO Auto-generated method stub                try {                       GMailSender sender = new GMailSender("[e-mail]", "password");                    sender.sendMail("This is Subject",                               "This is Body",                               "[e-mail]",                               "[e-mail]");                   } catch (Exception e) {                       Log.e("SendMail", e.getMessage(), e);                   }             }        });    }}

发件程序如下，

import javax.activation.DataHandler;   import javax.activation.DataSource;   import javax.mail.Message;   import javax.mail.PasswordAuthentication;   import javax.mail.Session;   import javax.mail.Transport;   import javax.mail.internet.InternetAddress;   import javax.mail.internet.MimeMessage;   import java.io.ByteArrayInputStream;   import java.io.IOException;   import java.io.InputStream;   import java.io.OutputStream;   import java.security.Security;   import java.util.Properties;   public class GMailSender extends javax.mail.Authenticator {       private String mailhost = "smtp.gmail.com";       private String user;       private String password;       private Session session;       static {           Security.addProvider(new com.provider.JSSEProvider());       }      public GMailSender(String user, String password) {           this.user = user;           this.password = password;           Properties props = new Properties();           props.setProperty("mail.transport.protocol", "smtp");           props.setProperty("mail.host", mailhost);           props.put("mail.smtp.auth", "true");           props.put("mail.smtp.port", "465");           props.put("mail.smtp.socketFactory.port", "465");           props.put("mail.smtp.socketFactory.class",                   "javax.net.ssl.SSLSocketFactory");           props.put("mail.smtp.socketFactory.fallback", "false");           props.setProperty("mail.smtp.quitwait", "false");           session = Session.getDefaultInstance(props, this);       }       protected PasswordAuthentication getPasswordAuthentication() {           return new PasswordAuthentication(user, password);       }       public synchronized void sendMail(String subject, String body, String sender, String recipients) throws Exception {           try{        MimeMessage message = new MimeMessage(session);           DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), "text/plain"));           message.setSender(new InternetAddress(sender));           message.setSubject(subject);           message.setDataHandler(handler);           if (recipients.indexOf(',') > 0)               message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients));           else              message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients));           Transport.send(message);           }catch(Exception e){        }    }       public class ByteArrayDataSource implements DataSource {           private byte[] data;           private String type;           public ByteArrayDataSource(byte[] data, String type) {               super();               this.data = data;               this.type = type;           }           public ByteArrayDataSource(byte[] data) {               super();               this.data = data;           }           public void setType(String type) {               this.type = type;           }           public String getContentType() {               if (type == null)                   return "application/octet-stream";               else                  return type;           }           public InputStream getInputStream() throws IOException {               return new ByteArrayInputStream(data);           }           public String getName() {               return "ByteArrayDataSource";           }           public OutputStream getOutputStream() throws IOException {               throw new IOException("Not Supported");           }       }   } 

JSSE将帮助处理TLS和SSL业务。JSSE Provider如下。

import java.security.AccessController;import java.security.Provider;public final class JSSEProvider extends Provider {    public JSSEProvider() {        super("HarmonyJSSE", 1.0, "Harmony JSSE Provider");        AccessController.doPrivileged(new java.security.PrivilegedAction<Void>() {            public Void run() {                put("SSLContext.TLS",                        "org.apache.harmony.xnet.provider.jsse.SSLContextImpl");                put("Alg.Alias.SSLContext.TLSv1", "TLS");                put("KeyManagerFactory.X509",                        "org.apache.harmony.xnet.provider.jsse.KeyManagerFactoryImpl");                put("TrustManagerFactory.X509",                        "org.apache.harmony.xnet.provider.jsse.TrustManagerFactoryImpl");                return null;            }        });    }}